C library functions - localtime ()

C standard library - <time.h>

description

C library functionsstruct tm * localtime (const time_t * timer) uses the value to fill timer tmstructure.timer value is decomposed into tmstructure, and represents the local time zone.

statement

The following is a statement localtime () function.

struct tm *localtime(const time_t *timer)

parameter

• timer - This is a pointer to a pointer showing a time_t calendar time value.

return value

This function returns a pointer totm structure, the structure is filled with time information.Below are details of the tm structure:

struct tm {
   int tm_sec;         /* 秒，范围从 0 到 59				*/
   int tm_min;         /* 分，范围从 0 到 59				*/
   int tm_hour;        /* 小时，范围从 0 到 23				*/
   int tm_mday;        /* 一月中的第几天，范围从 1 到 31	                */
   int tm_mon;         /* 月份，范围从 0 到 11				*/
   int tm_year;        /* 自 1900 起的年数				*/
   int tm_wday;        /* 一周中的第几天，范围从 0 到 6		        */
   int tm_yday;        /* 一年中的第几天，范围从 0 到 365	                */
   int tm_isdst;       /* 夏令时						*/	
};

Examples

The following example demonstrates the localtime () function is used.

#include <stdio.h>
#include <time.h>

int main ()
{
   time_t rawtime;
   struct tm *info;
   char buffer[80];

   time( &rawtime );

   info = localtime( &rawtime );
   printf("当前的本地时间和日期：%s", asctime(info));

   return(0);
}

Let's compile and run the above program, which will result in the following:

当前的本地时间和日期：Thu Aug 23 09:12:05 2012

C standard library - <time.h>